Hallahan, D. P., & Kauffman, J. (1997). Exceptional learners: Introduction to special education (7th ed.). Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Hallahan, Daniel P., agus James Kauffman. Exceptional Learners: Introduction to Special Education. 7th ed. Boston: Allyn and Bacon, 1997.
Lua MLA (9ú heag.)Hallahan, Daniel P., agus James Kauffman. Exceptional Learners: Introduction to Special Education. 7th ed. Allyn and Bacon, 1997.
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